Gas-engine.



v No. 806,199. PATENTED DEG.5,1905.

- P. SGHWBHM. r

, GAS ENGINE. APPLICATION FILED 1130.31, 1902.

2 SHEETfi-BHEBT 1.

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Mznasses [72067112072- 'm 'QZMW' I N o- 806,199. PATE NTBD DEC. 5, 1905.

P. SGHWEHM. 3GAS ENGINE;

APPLICATION FILED D130. 31, 1.902.

2 SHEETS-SHEET 2.

Winessea: I a Q I [11219716 072- UNITED STATES PATENT OFFICE. 1

PETER SOHWEHM, OF REISHOLZ, GERMANY.

GAS-ENGINE.

Specification of Letters Patent.

Application filed December 31, 1902. $e1ial No. 137,373-

improved construction, and'more particularly to themeans for controlling the flow of gas and air to the cylinder. v

The subject of the present invention, a two-cycle gas-engine, is illustrated in Figures 1 and 2 of the accompanying drawings in section.

The cylinder 11 of the gas-engine receives the necessary explosive mixture of gas and air from a as pump 7 and an air-pump 8, which may be operated and regulated independently of the gas-engine. Into the conduits 6 and 6, whichconnect the pumps7 and 8 to the cylinder 11, ressure-chambers 9 and 10 are inserted in ord er to regulate and equalize the pressure of the gas and air, respectively. In works in Which there are several gas-englnes common gas and air pumps and I intermediate reservoirscan be employed.

' and drivingone and that the cleaning-air From the chambers 9 and 1 0 the gas and the air, respectively, enter the cylinder 11 of the gas-engine by means of valves which are operated independently of each other, so that an exact regulation of the engine maybe eifected' In order to expel the gas residue after the explosion, the cleaning air admitted through the common inlet valve 2 must in order to retain its form of a strong properly-conducted column of air' be kept together after entering and conducted centrally, or nearly so, into the working cylinder 11, through the valve and the compression-chamber 4, in the direction of the axis of the cylinder. So, also, the velocity of the par,- ticles of air must be fairly equal, so that the movement of the whole column is a steady and the remainder of themixture are prevented from mixing. As the mixture is also employed for displacing the residue from the cylinder, its -movement must also answer the before-mentioned requirements. In the present construction the method. of conduct ingthe air uniformly is as follows: The valve 1, which controls the admission of gas to the mixing -chamber, is provided with a hollow stem 20, engaged by an elbow-lever 21. This lever receives motion from regulator-spindle 22 by means of cam 23 and link 24. The inlet-valve2 has a stem 25, which is embraced by hollow stem 20 and receives motion from Patented. Dec. 5. 1905.

spindle 22 by cam 26, link 27, and elbowlever 28. Both valves 1 and 2 are provided with conical caps3 in order to evenly conduct the gas and the gas-and-air mixture to v the explosion-chamber 4. The compressionchamber 4 is elbow-shaped and tapers gradually behind the inlet-valve, whereby the cross-section of the passage is reduced to the desired measurement, rendering the way taken by the air-current as even as possible.

Before entering the cylinder and-after being axially directed the cross section of the passage gradually widens conically. To conduct the displaced residue gradually and uniformly to the exit-openings 5, the piston is furnished with a conical cap 12, leading with a convex curve to the exit-openings 5 in a direction perpendicular to the axis of the cylinder. Similarly the piston-rod nut and collar 12? are conically formed/ As the cleaningair is introduced through the same inletvalve as themixture, the space between the gas-valve and'the inlet-valve must be as small as possible, so that the quantity of ready mixture which could eventually be carried away by the passage of the cleaningair be kept at a minimum. For this reason the gas-valve 1 is mounted centrally immediately behind the inlet-valve 2. I By this central arrangement of the two valves I attain at the same time a thorough mixing of the gas and air. The valve-caps 3 abovementioned serve to limit the storing chambers or reservoirs formed around the valves 1 and 2. In order to insure the small quantity of mixture between the gas-valve and the inlet-valve being utilized, the gas-valve (which is worked independently) is closed a short time before the inlet-valve is closed,'so that the still-entering air presses the gas out of the space between the two valves into the compression-chamber 4.

The engine is regulated either by variably opening the inlet-valve or by throttle, clack, or slide valves v13 and 14, arranged within the conduits 6 6 near the inlet-valve, in com- .the quantity turned out.

The return-pipe can act by leading the sur plus turned out by the pump, which is always working full, back into the suction-pipe or by creating circulation in the pumps to diminish For the latter purpose pipe 6 communicates with a cylinder 30, containing a spring influenced piston 31. The piston-rod 32 is by bell-crank lever 33 and a rod 34 connected to two claclcvalves 35 36. These valves play in a duct 37, that connects the ends of cylinder 7 at opposite sides of the piston. If the gas-pressure in pipe 6 and chamber 9 is excessive, the piston 31 is forced outward against the action of its spring in order to open valves 35 36 by lever 33 and rod 34. After the valves have been opened the gas entering the pressure side of cylinder 7 will be conveyed to the suction side of the same, so that the pressure within. chamber 9 and pipe 6 will decrease until the valves 35 36 are again closed.

What I claim is 1. In a gas-engine, the combination of a gas-pump and an air-pump with a gas-pipe and an air-pipe, a common mixing-chamber,

a valve between the gas-pipe and mixingchamber, a cylinder and piston, a valve between the mixing-chamber and cylinder, at regulator-spindle, means intermediate said spindle and. the valves for operating the valves independently of each other, and

means independent of the piston for opcrat- PETER SCHW'lGllM.

Witnesses WVILLIAM EssENwEIN, PETER LIEBER. 

